Plate 22. 
Figs. 1-6. Leiosella edax , new species, (p. 142.) 
1. Fragments of the free unilamellar zoarium, natural size. 
2. A tubular zoarium, X 20, with the zooecia exhibiting the large rimule spiramen. 
3. Ovicelled zooecia, X 20. 
4. Zooecia, X 20, in which the small frontal avicularia are replaced by a large avicularium with 
spatulate mandibles. 
5. A tubular zoarium, X 20, showing zooecia provided with an irregular rimule spiramen and 
with small avicularia. 
6. Interior of zooecia, X 20, showing the apertura and the peristomial avicularium. 
Lower Miocene (Chipola marl): Chipola River, Calhoun County, Florida. 
Figs. 7-14. Smittina trispinosa Johnston, 1838. (p. 143.) 
7. Unovicelled zooecia of a well preserved zoarium, X 20, with the avicularium small or absent. 
8. Ance3trula and surrounding zooecia of the same zoarium, X 20. 
Pliocene (Waccamaw marl): Waccamaw River, Horry County, South Carolina. 
9. Ancestrula region of a Miocene example, X 20. 
Miocene (Duplin marl): Wilmington, North Carolina. 
10. An abraded surface, X 20, showing the alternate arrangement of the zooecia between two 
rectilinear axes without septulae. 
11. An ovicelled zoarium, X 20, in which the ovicells are broken. The alternate arrangement 
of the zooecia is visible. 
12. Zooecia, X 20, with salient avicularia. 
13. Zooecia, X 20, in which the peristome is formed by two lateral salient lips. 
14. Zooecia, X 20, with well-preserved ovicells. 
Pliocene (Caloosahatchee marl): Shell Creek, De Soto County, Florida. 
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